Why, you need to actually read the Catholic sources you quoted. Of course she is all that, - she is the Mother of God.
But you also said something about blasphemy, and posted scripture about one God and one mediator, -- would you care to explain how, in your mind, the role of Blessed Virgin Mary in salvation is blasphemous or contrary to the scripture?
There is no other mediator. There is only one mediator, Jesus Christ.
There is no other intercessor. There is only one intercessor, Jesus Christ.
There is no other reconciler. There is only one reconciler, Jesus Christ.
All this is substantiated by Scripture. The RCC's hogging of the honor which belongs to God alone and distributing it to Mary and assorted dead saints is against Scripture, against God's laws, and demeans the work of Christ on the cross.
All in all, not so good.